Kevman:
You might want to keep in mind, however, that the VA12a driver is actually very buggy. I personally had to uninstall all my X10 cameras from my configuration since the driver hangs Windows and, because it's at such a low level in the system, I have to reboot Windows to get AHP to work again.
Also, remember that the more video activity you have in the system, the more CPU and RAM you will need to deal with it. It seems, however, that AHP does NOT release that memory. I assume it's probably a memory leak in the driver, which eventually kills Windows' resources. I used a 2Gig RAM duo core 2ghz machine with XP pro and it wasn't enough for AHP to run for more than a day or two before it died.
I gave up using the VA12a all together along with all the X10 cameras I had purchased. Instead, I went to a 16-camera dedicated DVR, which I can access remotely, get emails/text messages from, and capture images that get sent to my email.
I also gave up using the latest version of AHP because it, too, is very buggy. I went back 3.228 and no video and now, my machine stays up 24/7.